Example
git merge incomingBranch
This merges the branch incomingBranch into the branch you are currently in. For example, if you are currently in master, then incomingBranch will be merged into master.
Merging can create conflicts in some cases. If this happens, you will see the message Automatic merge failed; fix conflicts and then commit the result. You will need to manually edit the conflicted files, or to undo your merge attempt, run:
git merge --abort
